<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <input type="text" v-focus='5000'>
    </div>
</body>
<script src="./vue.js"></script>
<script>
    const focus={
        inserted:function(el,binding){
            el.focus()
            console.log(binding.value)
        }
    }
    const vm =new Vue({
        el:'#app',
        directives:{
            focus
        }
    })
</script>
</html>